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   <div id="projectbrief">Generic and Reusable Parallel Pattern Interface</div>
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<li class="navelem"><a class="el" href="dir_d44c64559bbebec7f509842c48db8b23.html">include</a></li><li class="navelem"><a class="el" href="dir_0966d06610f72609fd9aa4979c2b5a92.html">common</a></li>  </ul>
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<a href="mpmc__queue_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Copyright 2018 Universidad Carlos III de Madrid</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * </span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * you may not use this file except in compliance with the License.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * You may obtain a copy of the License at</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> * </span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> *     http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment"> * </span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment"> * Unless required by applicable law or agreed to in writing, software</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment"> * distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment"> * See the License for the specific language governing permissions and</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment"> * limitations under the License.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="preprocessor">#ifndef GRPPI_COMMON_MPMC_QUEUE_H</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="preprocessor">#define GRPPI_COMMON_MPMC_QUEUE_H</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160; </div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160; </div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor">#include &lt;atomic&gt;</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#include &lt;iostream&gt;</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="preprocessor">#include &lt;mutex&gt;</span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor">#include &lt;condition_variable&gt;</span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160; </div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="keyword">namespace </span><a class="code" href="namespacegrppi.html">grppi</a>{</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160; </div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160; </div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160; </div>
<div class="line"><a name="l00030"></a><span class="lineno"><a class="line" href="namespacegrppi.html#aa0514650a765d4853343655e7588662b">   30</a></span>&#160;<span class="keyword">enum class</span> <a class="code" href="namespacegrppi.html#aa0514650a765d4853343655e7588662b">queue_mode</a> {<a class="code" href="namespacegrppi.html#aa0514650a765d4853343655e7588662bac6235a845472fa847daf07edbbf5fa18">lockfree</a> = <span class="keyword">true</span>, <a class="code" href="namespacegrppi.html#aa0514650a765d4853343655e7588662ba14343966a1d7dce7526e57cf2206d19d">blocking</a> = <span class="keyword">false</span>};</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160; </div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00033"></a><span class="lineno"><a class="line" href="classgrppi_1_1mpmc__queue.html">   33</a></span>&#160;<span class="keyword">class </span><a class="code" href="classgrppi_1_1mpmc__queue.html">mpmc_queue</a>{</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160; </div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;   <span class="keyword">public</span>:</div>
<div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="classgrppi_1_1mpmc__queue.html#a343e8c80235cf1772633606f442c58c6">   36</a></span>&#160;      <span class="keyword">using</span> <a class="code" href="classgrppi_1_1mpmc__queue.html#a343e8c80235cf1772633606f442c58c6">value_type</a> = T;</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160; </div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;      <a class="code" href="classgrppi_1_1mpmc__queue.html">mpmc_queue&lt;T&gt;</a>(<span class="keywordtype">int</span> q_size, <a class="code" href="namespacegrppi.html#aa0514650a765d4853343655e7588662b">queue_mode</a> q_mode ) :</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;          size{q_size}, </div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;          buffer{std::vector&lt;T&gt;(q_size)}, </div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;          mode{q_mode}, </div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;          pread{0}, </div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;          pwrite{0}, </div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;          internal_pread{0}, </div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;          internal_pwrite{0} </div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;      {}</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;      </div>
<div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="classgrppi_1_1mpmc__queue.html#a686cf365570236237913d6bd7a556768">   48</a></span>&#160;      <a class="code" href="classgrppi_1_1mpmc__queue.html#a686cf365570236237913d6bd7a556768">mpmc_queue</a>(<a class="code" href="classgrppi_1_1mpmc__queue.html">mpmc_queue</a> &amp;&amp; q) :</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;        size{q.size},</div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;        buffer{std::move(q.buffer)},</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;        mode{q.mode},</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;        pread{q.pread.load()},</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;        pwrite{q.pwrite.load()},</div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;        internal_pread{q.internal_pread.load()},</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;        internal_pwrite{q.internal_pwrite.load()},</div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;        m{},</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;        empty{},</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;        full{}</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;      {}</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160; </div>
<div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="classgrppi_1_1mpmc__queue.html#a09576b365db27b0d3403c22b7b1dfd17">   61</a></span>&#160;      <a class="code" href="classgrppi_1_1mpmc__queue.html#a09576b365db27b0d3403c22b7b1dfd17">mpmc_queue</a>(<span class="keyword">const</span> <a class="code" href="classgrppi_1_1mpmc__queue.html">mpmc_queue</a> &amp;) = <span class="keyword">delete</span>; </div>
<div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="classgrppi_1_1mpmc__queue.html#a065aeb6cf5567aa0a3173fd97c137b23">   62</a></span>&#160;      <a class="code" href="classgrppi_1_1mpmc__queue.html">mpmc_queue</a> &amp; <a class="code" href="classgrppi_1_1mpmc__queue.html#a065aeb6cf5567aa0a3173fd97c137b23">operator=</a>(<span class="keyword">const</span> <a class="code" href="classgrppi_1_1mpmc__queue.html">mpmc_queue</a> &amp;) = <span class="keyword">delete</span>;</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;    </div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;      <span class="keywordtype">bool</span> <a class="code" href="classgrppi_1_1mpmc__queue.html#a8504bb510548e8de6763a27bf4bfc550">is_empty</a> () const noexcept;</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;      T <a class="code" href="classgrppi_1_1mpmc__queue.html#aa4e63cc8a3cc2006494b11b739711f8e">pop</a> () ;</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;      <span class="keywordtype">bool</span> <a class="code" href="classgrppi_1_1mpmc__queue.html#aa18eda40dec95f4c568f5f40775e8e19">push</a> (T item) ;</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160; </div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;   private:</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;      <span class="keywordtype">bool</span> is_full (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> current) const noexcept;</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;      <span class="keywordtype">bool</span> <a class="code" href="classgrppi_1_1mpmc__queue.html#a8504bb510548e8de6763a27bf4bfc550">is_empty</a> (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> current) const noexcept;</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160; </div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;      <span class="keywordtype">int</span> size;</div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;      std::vector&lt;T&gt; buffer;</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;      <a class="code" href="namespacegrppi.html#aa0514650a765d4853343655e7588662b">queue_mode</a> mode;</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160; </div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;      std::atomic&lt;<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span>&gt; pread;</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;      std::atomic&lt;<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span>&gt; pwrite;</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;      std::atomic&lt;<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span>&gt; internal_pread;</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;      std::atomic&lt;<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span>&gt; internal_pwrite;</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160; </div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160; </div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;      std::mutex m {};</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;      std::condition_variable empty{};</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;      std::condition_variable full{};</div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160; </div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;};</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160; </div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160; </div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00090"></a><span class="lineno"><a class="line" href="classgrppi_1_1mpmc__queue.html#a8504bb510548e8de6763a27bf4bfc550">   90</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="classgrppi_1_1mpmc__queue.html#a8504bb510548e8de6763a27bf4bfc550">mpmc_queue&lt;T&gt;::is_empty</a>() const noexcept {</div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;    <span class="keywordflow">return</span> pread.load()==pwrite.load();</div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;}</div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160; </div>
<div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00095"></a><span class="lineno"><a class="line" href="classgrppi_1_1mpmc__queue.html#aa4e63cc8a3cc2006494b11b739711f8e">   95</a></span>&#160;T <a class="code" href="classgrppi_1_1mpmc__queue.html#aa4e63cc8a3cc2006494b11b739711f8e">mpmc_queue&lt;T&gt;::pop</a>(){</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;  <span class="keywordflow">if</span>(mode == <a class="code" href="namespacegrppi.html#aa0514650a765d4853343655e7588662bac6235a845472fa847daf07edbbf5fa18">queue_mode::lockfree</a>){</div>
<div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;    </div>
<div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;     <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> current;</div>
<div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160; </div>
<div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;     <span class="keywordflow">do</span>{</div>
<div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;        current = internal_pread.load();</div>
<div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;     }<span class="keywordflow">while</span>(!internal_pread.compare_exchange_weak(current, current+1));</div>
<div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;          </div>
<div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;     <span class="keywordflow">while</span>(is_empty(current));</div>
<div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160; </div>
<div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;     <span class="keyword">auto</span> item = std::move(buffer[current%size]); </div>
<div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;     <span class="keyword">auto</span> aux = current;</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;     <span class="keywordflow">do</span>{</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;        current = aux;</div>
<div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;     }<span class="keywordflow">while</span>(!pread.compare_exchange_weak(current, current+1));</div>
<div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;     </div>
<div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;     <span class="keywordflow">return</span> std::move(item);</div>
<div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;  }<span class="keywordflow">else</span>{</div>
<div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;     </div>
<div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;     std::unique_lock&lt;std::mutex&gt; lk(m);</div>
<div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;     <span class="keywordflow">while</span>(is_empty(pread)){</div>
<div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;        empty.wait(lk);</div>
<div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;     }  </div>
<div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;     <span class="keyword">auto</span> item = std::move(buffer[pread%size]);</div>
<div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;     pread++;    </div>
<div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;     lk.unlock();</div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;     full.notify_one();</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;     </div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;     <span class="keywordflow">return</span> std::move(item);</div>
<div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;  }</div>
<div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160; </div>
<div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;}</div>
<div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160; </div>
<div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00130"></a><span class="lineno"><a class="line" href="classgrppi_1_1mpmc__queue.html#aa18eda40dec95f4c568f5f40775e8e19">  130</a></span>&#160;<span class="keywordtype">bool</span> <a class="code" href="classgrppi_1_1mpmc__queue.html#aa18eda40dec95f4c568f5f40775e8e19">mpmc_queue&lt;T&gt;::push</a>(T item){</div>
<div class="line"><a name="l00131"></a><span class="lineno">  131</span>&#160;  <span class="keywordflow">if</span>(mode == <a class="code" href="namespacegrppi.html#aa0514650a765d4853343655e7588662bac6235a845472fa847daf07edbbf5fa18">queue_mode::lockfree</a>){</div>
<div class="line"><a name="l00132"></a><span class="lineno">  132</span>&#160;     <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> current;</div>
<div class="line"><a name="l00133"></a><span class="lineno">  133</span>&#160;     <span class="keywordflow">do</span>{</div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;         current = internal_pwrite.load();</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;     }<span class="keywordflow">while</span>(!internal_pwrite.compare_exchange_weak(current, current+1));</div>
<div class="line"><a name="l00136"></a><span class="lineno">  136</span>&#160; </div>
<div class="line"><a name="l00137"></a><span class="lineno">  137</span>&#160;     <span class="keywordflow">while</span>(is_full(current));</div>
<div class="line"><a name="l00138"></a><span class="lineno">  138</span>&#160; </div>
<div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;     buffer[current%size] = std::move(item);</div>
<div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;  </div>
<div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;     <span class="keyword">auto</span> aux = current;</div>
<div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;     <span class="keywordflow">do</span>{</div>
<div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;        current = aux;</div>
<div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;     }<span class="keywordflow">while</span>(!pwrite.compare_exchange_weak(current, current+1));</div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160; </div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;     <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;  }<span class="keywordflow">else</span>{</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160; </div>
<div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;    std::unique_lock&lt;std::mutex&gt; lk(m);</div>
<div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;    <span class="keywordflow">while</span>(is_full(pwrite)){</div>
<div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;        full.wait(lk);</div>
<div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;    }</div>
<div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;    buffer[pwrite%size] = std::move(item);</div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160; </div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;    pwrite++;</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;    lk.unlock();</div>
<div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;    empty.notify_one();</div>
<div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160; </div>
<div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;    <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;  }</div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;}</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160; </div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;<span class="keywordtype">bool</span> <a class="code" href="classgrppi_1_1mpmc__queue.html#a8504bb510548e8de6763a27bf4bfc550">mpmc_queue&lt;T&gt;::is_empty</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> current) <span class="keyword">const</span> noexcept {</div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;  <span class="keywordflow">if</span>(current &gt;= pwrite.load()) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;}</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160; </div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;<span class="keywordtype">bool</span> mpmc_queue&lt;T&gt;::is_full(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> <span class="keywordtype">long</span> current) <span class="keyword">const</span> noexcept{</div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;  <span class="keywordflow">if</span>(current &gt;= (pread.load()+size)) <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160; </div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;}</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160; </div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;<span class="keyword">namespace </span>internal {</div>
<div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160; </div>
<div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00179"></a><span class="lineno"><a class="line" href="structgrppi_1_1internal_1_1is__queue.html">  179</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structgrppi_1_1internal_1_1is__queue.html">is_queue</a> : std::false_type {};</div>
<div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160; </div>
<div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00182"></a><span class="lineno"><a class="line" href="structgrppi_1_1internal_1_1is__queue_3_01mpmc__queue_3_01_t_01_4_01_4.html">  182</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structgrppi_1_1internal_1_1is__queue.html">is_queue</a>&lt;<a class="code" href="classgrppi_1_1mpmc__queue.html">mpmc_queue</a>&lt;T&gt;&gt; : std::true_type {};</div>
<div class="line"><a name="l00183"></a><span class="lineno">  183</span>&#160; </div>
<div class="line"><a name="l00184"></a><span class="lineno">  184</span>&#160;}</div>
<div class="line"><a name="l00185"></a><span class="lineno">  185</span>&#160; </div>
<div class="line"><a name="l00186"></a><span class="lineno">  186</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00187"></a><span class="lineno"><a class="line" href="classgrppi_1_1mpmc__queue.html#a831fb1b11bf0da38d55b6b2b4715de0a">  187</a></span>&#160;constexpr <span class="keywordtype">bool</span> <a class="code" href="namespacegrppi.html#a4759187bf78c23c2a80900e5ae296bbc">is_queue</a> = <a class="code" href="structgrppi_1_1internal_1_1is__queue.html">internal::is_queue&lt;T&gt;</a>();</div>
<div class="line"><a name="l00188"></a><span class="lineno">  188</span>&#160; </div>
<div class="line"><a name="l00189"></a><span class="lineno">  189</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00190"></a><span class="lineno"><a class="line" href="namespacegrppi.html#ad4e9c4e7be72227c0ec55d198f18c51e">  190</a></span>&#160;<span class="keyword">using</span> <a class="code" href="namespacegrppi.html#ad4e9c4e7be72227c0ec55d198f18c51e">requires_queue</a> = std::enable_if_t&lt;is_queue&lt;T&gt;, <span class="keywordtype">int</span>&gt;;</div>
<div class="line"><a name="l00191"></a><span class="lineno">  191</span>&#160; </div>
<div class="line"><a name="l00192"></a><span class="lineno">  192</span>&#160;}</div>
<div class="line"><a name="l00193"></a><span class="lineno">  193</span>&#160; </div>
<div class="line"><a name="l00194"></a><span class="lineno">  194</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="ttc" id="aclassgrppi_1_1mpmc__queue_html"><div class="ttname"><a href="classgrppi_1_1mpmc__queue.html">grppi::mpmc_queue</a></div><div class="ttdef"><b>Definition:</b> mpmc_queue.h:33</div></div>
<div class="ttc" id="aclassgrppi_1_1mpmc__queue_html_a065aeb6cf5567aa0a3173fd97c137b23"><div class="ttname"><a href="classgrppi_1_1mpmc__queue.html#a065aeb6cf5567aa0a3173fd97c137b23">grppi::mpmc_queue::operator=</a></div><div class="ttdeci">mpmc_queue &amp; operator=(const mpmc_queue &amp;)=delete</div></div>
<div class="ttc" id="aclassgrppi_1_1mpmc__queue_html_a09576b365db27b0d3403c22b7b1dfd17"><div class="ttname"><a href="classgrppi_1_1mpmc__queue.html#a09576b365db27b0d3403c22b7b1dfd17">grppi::mpmc_queue::mpmc_queue</a></div><div class="ttdeci">mpmc_queue(const mpmc_queue &amp;)=delete</div></div>
<div class="ttc" id="aclassgrppi_1_1mpmc__queue_html_a343e8c80235cf1772633606f442c58c6"><div class="ttname"><a href="classgrppi_1_1mpmc__queue.html#a343e8c80235cf1772633606f442c58c6">grppi::mpmc_queue::value_type</a></div><div class="ttdeci">T value_type</div><div class="ttdef"><b>Definition:</b> mpmc_queue.h:36</div></div>
<div class="ttc" id="aclassgrppi_1_1mpmc__queue_html_a686cf365570236237913d6bd7a556768"><div class="ttname"><a href="classgrppi_1_1mpmc__queue.html#a686cf365570236237913d6bd7a556768">grppi::mpmc_queue::mpmc_queue</a></div><div class="ttdeci">mpmc_queue(mpmc_queue &amp;&amp;q)</div><div class="ttdef"><b>Definition:</b> mpmc_queue.h:48</div></div>
<div class="ttc" id="aclassgrppi_1_1mpmc__queue_html_a8504bb510548e8de6763a27bf4bfc550"><div class="ttname"><a href="classgrppi_1_1mpmc__queue.html#a8504bb510548e8de6763a27bf4bfc550">grppi::mpmc_queue::is_empty</a></div><div class="ttdeci">bool is_empty() const noexcept</div><div class="ttdef"><b>Definition:</b> mpmc_queue.h:90</div></div>
<div class="ttc" id="aclassgrppi_1_1mpmc__queue_html_aa18eda40dec95f4c568f5f40775e8e19"><div class="ttname"><a href="classgrppi_1_1mpmc__queue.html#aa18eda40dec95f4c568f5f40775e8e19">grppi::mpmc_queue::push</a></div><div class="ttdeci">bool push(T item)</div><div class="ttdef"><b>Definition:</b> mpmc_queue.h:130</div></div>
<div class="ttc" id="aclassgrppi_1_1mpmc__queue_html_aa4e63cc8a3cc2006494b11b739711f8e"><div class="ttname"><a href="classgrppi_1_1mpmc__queue.html#aa4e63cc8a3cc2006494b11b739711f8e">grppi::mpmc_queue::pop</a></div><div class="ttdeci">T pop()</div><div class="ttdef"><b>Definition:</b> mpmc_queue.h:95</div></div>
<div class="ttc" id="anamespacegrppi_html"><div class="ttname"><a href="namespacegrppi.html">grppi</a></div><div class="ttdef"><b>Definition:</b> callable_traits.h:21</div></div>
<div class="ttc" id="anamespacegrppi_html_a4759187bf78c23c2a80900e5ae296bbc"><div class="ttname"><a href="namespacegrppi.html#a4759187bf78c23c2a80900e5ae296bbc">grppi::is_queue</a></div><div class="ttdeci">constexpr bool is_queue</div><div class="ttdef"><b>Definition:</b> mpmc_queue.h:187</div></div>
<div class="ttc" id="anamespacegrppi_html_aa0514650a765d4853343655e7588662b"><div class="ttname"><a href="namespacegrppi.html#aa0514650a765d4853343655e7588662b">grppi::queue_mode</a></div><div class="ttdeci">queue_mode</div><div class="ttdef"><b>Definition:</b> mpmc_queue.h:30</div></div>
<div class="ttc" id="anamespacegrppi_html_aa0514650a765d4853343655e7588662ba14343966a1d7dce7526e57cf2206d19d"><div class="ttname"><a href="namespacegrppi.html#aa0514650a765d4853343655e7588662ba14343966a1d7dce7526e57cf2206d19d">grppi::queue_mode::blocking</a></div><div class="ttdeci">@ blocking</div></div>
<div class="ttc" id="anamespacegrppi_html_aa0514650a765d4853343655e7588662bac6235a845472fa847daf07edbbf5fa18"><div class="ttname"><a href="namespacegrppi.html#aa0514650a765d4853343655e7588662bac6235a845472fa847daf07edbbf5fa18">grppi::queue_mode::lockfree</a></div><div class="ttdeci">@ lockfree</div></div>
<div class="ttc" id="anamespacegrppi_html_ad4e9c4e7be72227c0ec55d198f18c51e"><div class="ttname"><a href="namespacegrppi.html#ad4e9c4e7be72227c0ec55d198f18c51e">grppi::requires_queue</a></div><div class="ttdeci">std::enable_if_t&lt; is_queue&lt; T &gt;, int &gt; requires_queue</div><div class="ttdef"><b>Definition:</b> mpmc_queue.h:190</div></div>
<div class="ttc" id="astructgrppi_1_1internal_1_1is__queue_html"><div class="ttname"><a href="structgrppi_1_1internal_1_1is__queue.html">grppi::internal::is_queue</a></div><div class="ttdef"><b>Definition:</b> mpmc_queue.h:179</div></div>
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